19 int io_u_rinit(struct io_u_ring *ring, unsigned int nr)  in io_u_rinit()  argument
21 	ring->max = nr + 1;  in io_u_rinit()
22 	if (ring->max & (ring->max - 1)) {  in io_u_rinit()
23 		ring->max--;  in io_u_rinit()
24 		ring->max |= ring->max >> 1;  in io_u_rinit()
25 		ring->max |= ring->max >> 2;  in io_u_rinit()
26 		ring->max |= ring->max >> 4;  in io_u_rinit()
27 		ring->max |= ring->max >> 8;  in io_u_rinit()
28 		ring->max |= ring->max >> 16;  in io_u_rinit()
29 		ring->max++;  in io_u_rinit()
32 	ring->ring = calloc(ring->max, sizeof(struct io_u *));  in io_u_rinit()
33 	if (!ring->ring)  in io_u_rinit()
36 	ring->head = ring->tail = 0;  in io_u_rinit()
40 void io_u_rexit(struct io_u_ring *ring)  in io_u_rexit()  argument
42 	free(ring->ring);  in io_u_rexit()